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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
+ d" X1 [9 m5 ~( G6 n+ ra) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
! D* Z! v6 ]% ?0 S1 Y( Yvoltage, minimum CLEARANCES are determined from Table 2K;
$ t* r0 ^2 f6 l4 e* q& @* N5 e* hb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
3 p% G& Y( z6 Athe minimum CLEARANCE is the sum of the following two values:
/ k5 q- q6 g0 v1 w" L" z• the minimum CLEARANCE from Table 2K; and
2 S# @% G( r5 p6 G; B1 Z0 i• the appropriate additional CLEARANCE from Table 2L.
1 A9 T& z/ I8 p5 F
& y: G( z( ~+ H标准中的b)第一点中“the minimum CLEARANCE”是相对于什么的最小间隙呢?? |
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